In situ synthesis, characterization, and catalytic performance of tungstophosphoric acid encapsulated into the framework of mesoporous silica pillared clay
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作者:
Li, Baoshan
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Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R ChinaBeijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
Li, Baoshan
[1
]
Liu, Zhenxing
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Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R ChinaBeijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
Liu, Zhenxing
[1
]
Han, Chunying
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Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R ChinaBeijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
Han, Chunying
[1
]
Ma, Wei
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Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R ChinaBeijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
Ma, Wei
[1
]
Zhao, Songjie
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China Natl Gold Grp Corp, Beijing 100011, Peoples R ChinaBeijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
Zhao, Songjie
[2
]
机构:
[1] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
[2] China Natl Gold Grp Corp, Beijing 100011, Peoples R China
Mesoporous silica pillared clay (SPC) incorporated with tungstophosphoric acid (HPW) has been synthesized via in situ introducing P and W source in the acidic suspension of the clay interlayer template during the formation of the silica pillared clay. The samples were characterized by XRD, XRF, FT-IR, TG-DTA, N-2 adsorption-desorption, and SEM techniques. The results showed that the HPW formed by in situ method has been effectively introduced into the framework of mesoporous silica pillared clay and its Keggin structure remained perfectly after formation of the materials. In addition, samples with similar HPW loadings were also prepared by impregnation method using SPC as the support. HPW in the incorporated samples was better dispersed into the silica pillared clay than in the impregnated samples. The results of catalytic tests indicated that the encapsulated materials demonstrated better catalytic performance than the impregnated samples in oxidative desulfurization (ODS) of dibenzothiophene (DBT). (C) 2012 Elsevier Inc. All rights reserved.